- D Start by figuring out what percent of the houses do not have two-car garages. Since 60% of the
houses with garages have two-car garages, 40% of the houses with garages do not have two-car
garages. In other words, 40% of 80% of the houses do not have two-car garages. Translate that
into math to get of the houses. The problem tells us that 56 houses do not have two-
car garages, which means 32% of the houses equals 56. Translating into math gives us × x
= 56. Solve for x, and you’ll get 175, which is (D).
- D Let’s try out the answers and see which one works. Start with (B). If the watchmaker made 21
watches on Tuesday, then he must have made 17 watches on Monday. We know that he should
have made 16% more watches on Tuesday than on Monday, so let’s use the percent change
formula to see if we get 16%: ≈ 23.5%, which is too big. Eliminate
(B). We want the 4 watches to be a smaller percent of the total, so we need a bigger total. Try a
bigger answer choice, like (D). If he made 29 watches on Tuesday, then he made 25 watches on
Monday. Now the percent change is = 0.16 = 16%, which is exactly what we wanted.
Therefore, (D) is the correct answer.
